Third column: alternative suppliers are suppliers also offering such products while having an ad package. On their own company profile pages, the right column of the table contains their product descriptions instead of alternative suppliers.

Video on Online Marketing

See the following video which explains

why the RP Photonics website is extremely popular among photonics professionals

Shortages of rare earth materials – a problem for photonics?

Photonics heavily depends on the supply of rare earth materials in various areas – think of laser crystals, active fibers and LEDs, for example.
It is hard to see how such things could be done without rare earth materials.
And those have recently been subject to enormous price increases and were even involved in a trade war.

Is that now a reason for serious concerns in the area of photonics?
Do we need to undertake serious recycling efforts?
Our Photonics Spotlight article analyzes the situation.